Lubricant varieties and selection principles you must know
The internal and external lubrication effect of red phosphorus as a metal hydroxide flame retardant is not only related to the structure of the lubricant, but also related to the chemical structure of the resin. A lubricant, such as paraffin, is an external lubricant for PVC and an internal lubricant for PE. Both the release agent and the release agent can be considered as special applications for lubricants. The release agent is divided into two types: an external release agent (such as silicone oil) and an internal release agent and a lubricant. As production continuity requirements continue to increase, it is common to use internal release agents and lubricants, such as zinc stearate and amides in PVC. Fatty acid amide (1) Stearic acid amide can be used as a lubricant and release agent for PVC, PS, urea-formaldehyde resin, and has good external lubricant effect. This product can also be used as an anti-adhesive for PE film. Non-toxic. License food packaging materials for US FDA. The main production plant: Shanghai Zhonghua Chemical Plant, armak (USA) ashland (USA). (2) Ethylene bis stearamide (EBS) can be used as a lubricant for PVC, polyolefin, aBS, phenolic resin and amino resin, and has both internal and external lubricants. Non-toxic, licensed for food packaging materials for US FDA. Major production plants: Lanhua Organic Plant, Chemetron (USA) armak (USA) (3) Oleic acid amide has good lubricating properties for PE, PP and Pa, has anti-blocking and antistatic effects, is non-toxic, and is approved for food packaging materials by FDA in the United States. Major production plants: Shanghai Zhonghua Chemical Plant, armak (USA), ashland (USA), ICI (UK) Henkel (Germany). (4) Erucamide can be used as a high temperature processing lubricant, especially suitable for PP. Non-toxic, US FDA is licensed for food packaging. Major production plants: Shanghai Zhonghua Chemical Plant, ashland (USA) armak (USA) Fatty acids and esters (1) Stearic acid is used as a lubricant for PVC. It has both internal and external lubrication properties. It is mainly based on internal lubrication. This product will affect the gelation speed of the resin. It is better combined with butyl stearate. Non-toxic, US FDA is licensed for food packaging. Major production plants: Qingdao Hongxing Chemical Plant, Chongqing Changjiang Chemical Plant, ashland (USA), Henkel (Germany) (2) Lignite ester wax derivatives are E wax, O wax, EG wax and OP wax. They are used for PVC. The internal and external lubricity balance is high and the lubricity is good. Among them, O wax and OP wax are PVC advanced lubricants. Main production plant: Jilin Shulan Mineral Bureau Chemical Plant, Hoechst (Germany) (3) Stearate. Butyl stearate is used in PVC, PS, and has excellent internal lubricant action. Stearic acid monoglyceride has good internal lubrication and is an antistatic and anti-fog lubricant. However, the lubrication effect is poor and non-toxic. Major production plants: Shanghai Dongfang Chemical Plant, Shanghai Yan'an Grease Chemical Plant, ashland (USA), Emery (USA) Metal soap. Generally used as an external lubricant, it is also a PVC heat stabilizer. (1) Calcium stearate is used in PVC, PP, aBS, unsaturated polyester, phenolic resin, non-toxic. The main production plants: Shenyang Auxiliary Factory, Shanghai Yan'an Oil Chemical Plant, aCC (USA), Penick (USA). (2) Zinc stearate is used for PVC, PS, Pa, urea-formaldehyde resin, unsaturated polyester. Non-toxic. The main production plants: Shanghai Yan'an Oil Chemical Plant, Nanjing Jinling Chemical Plant, aCC (USA), Penick (USA) similar varieties, as well as aluminum, barium, magnesium, cadmium salts of stearic acid, mainly used in PVC. Hydrocarbon (1) Polyethylene wax having a molecular weight of 1500-5000. It has strong external lubrication effect on PVC, has internal lubrication effect on PE, and has anti-blocking property to improve the dispersibility of pigment and filler, but it has poor compatibility with PVC and is non-toxic. The main production plant: Shanghai Zhonghua Chemical Plant, allied (USA) (2) Oxidized polyethylene is a partial oxidation product of polyethylene wax having a certain amount of carboxyl groups and hydroxyl groups in the molecule. The PVC has both internal and external lubrication, and the transparency and gloss of the product are better than that of the polyethylene wax. Major production plants: Shanghai Zhonghua Chemical Plant, NL Industrirs (USA) Principle of selection of lubricants (1) The melting point of the lubricant is generally 50-60 ° C lower than the molding processing temperature. (2) It is necessary to properly balance the fluidity, anti-adhesion and plasticizing rate of plastics. To balance the internal and external lubricants. (3) Maintain the integrity of the lubrication effect in the early, middle and late stages of the system. (4) There is no negative impact on secondary processing (heat sealing, lamination, printing, etc.). (5) The lubricant has good dispersibility in the resin, and if necessary, a dispersant is added. (6) Pay attention to the interaction with other additives (plasticizers, heat stabilizers, antioxidants, fillers, impact agents, etc.). Lubricants were mainly used in PVC earlier. In recent years, the amount of lubricants in polyolefins and engineering plastics has increased rapidly, and the dosage is close to that in PVC. At present, many plastics factories have their own patented formulas in use. Recently, polymer blended alloys have become more and more widely used, and the demand for such products will also increase greatly. Compared with homopolymers and copolymers, the composition and formulation of the lubricants are different, and research and development according to the special requirements of users is also a new direction for the development of lubricants. Ernte | Automatic Coffee Machines, Fully Automatic Coffee Machines,Automatic Espresso Coffee Maker,Best Automatic Coffee Makers SUN YAT INDUSTRY LIMITED , https://www.ernte-eu.com